cellForRowAt not being called But numberOfSection and numberOfRowsInSection is being called - ios

Question

My code:
//Adding Destination VC as subview in my current view's view container
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier: "DestinationViewControllerID")
containerView.addSubview(viewController.view)
viewController.didMove(toParentViewController: self)
//Now implementing Table view in the destination vc
class DestinationViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
var tableView = UITableView()
var tableData = ["Beach", "Clubs", "Chill", "Dance"]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let screenBounds = UIScreen.main.bounds
let rect = CGRect(x: 0, y: 0, width: screenBounds.width, height: screenBounds.height)
tableView = UITableView(frame: rect, style: UITableViewStyle.plain)
tableView.dataSource = self
tableView.delegate = self
tableView.backgroundColor = UIColor.blue
tableView.register(UITableViewCell.self, forCellReuseIdentifier: "my")
view.addSubview(tableView)
tableView.reloadData()
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "my", for: indexPath)
cell.textLabel?.text = "This is row \(tableData[indexPath.row])"
return cell
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 4//tableData.count
}
}
If I'm Setting the destination viewController as my initial vc from storyboard then everything is working fine.But if adding as subview in container view the cellForRowAt method is not being called but numberOfSection and numberOfRowsInSection is being called.
Is there anyone having any solution ?

Answer 1

Add self.addChildViewController(viewController) before subviewing
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let viewController = storyboard.instantiateViewController(withIdentifier: "DestinationViewControllerID")
self.addChildViewController(viewController)
containerView.addSubview(viewController.view)
viewController.didMove(toParentViewController: self)

Answer 2

Make sure that constraints are set on UITableView. If so, try to to set height of UITableViewCell manually.

Answer 3

Firstly, you need to have a tableview in your storyboard. After creating tableView you may subview it programmatically by:
self.view.addSubview(tableView)
or add tableView in your storyboard and create an IBOutlet like this:
#IBOutlet weak var tableView: UITableView!
Secondly, you haven't initialized your cell, you have only dequeued a previously created cell(which, in your case has never got created). Your code should be something like this:
var cell = tableView.dequeueReusableCell(withIdentifier: "my", for: indexPath) as UITableViewCell?
if cell == nil {
cell = UITableViewCell(style: UITableViewCellStyle.default, reuseIdentifier: "my")
}

Answer 4

Check your table's top-bottom-left-right constant. If your table's height is 0 then cellForRow method may not be call. If you not set your table's constant properly then then it's height may become 0.

Answer 5

Recheck are registered reusableidentifier
tableView.dequeueReusableCell(withIdentifier: "my", for: indexPath)